Analysis on Vicisstude of Ming-Qingia Mongolia Society

What makes the unprecedented powerful and rapid developing Mongol people in the thirteenth century gradually varied as a conservative and declined weak nation,which is an important thesis in our ethnic history study.Surveying the Ming and Qing Dynasties,it's found that Mongolia's economy underwent four stages roughly: i.e.from depression to recovery,then to stable development,till lasting low and dull period.Accompany with this produre,Mongolia changed from former separate state of feudal division system to local alliances belonging to central government,and accordingly class strcture of Mongolia also altered a lot.Causes for these changes lie in three aspects: long-time wars and collapses of Mongolia nation,ethnic split and isolate policy adopted by the Ming and Qing's government and spread of Lama Religionas well as political support and use to it.